bargain tubs
sungod
Posts: 16,087
bike24 has a special offer, they're labelled as schwalbe but look exactly like old veloflex carbons...
http://www.bike24.de/1.php?menu=1000%2C4%2C22%2C35;search=ultremo;content=8;product=28502
...at c 30€ that's a real bargain, i've ordered several
http://www.bike24.de/1.php?menu=1000%2C4%2C22%2C35;search=ultremo;content=8;product=28502
...at c 30€ that's a real bargain, i've ordered several
my bike - faster than god's and twice as shiny
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i think it's more a matter of road condition than season, if you're on roads plagued with flints, glass etc. then they'll cut much more easily in the wet so saving them for dryer times may be best
fwiw i put a new set on and there's about 1800km on them so far, 1200km lanzarote, the rest london, so far no cuts and only after the last ride (wet) did i find a tiny flint embedded, about 1.5mm, no harm done though
but in the past i've had one badly cut within a week, really luck of the draw
i use carbon on the front, arenberg rear as it lasts longer and traction seems better
If they are for racing they are worth a punt but I would train in them
Every tub I've seen on sale last few years have removable cores. Mainly since deep rims are more affordable to general public
veloflex are a lot more supple than conti sprinters, different rubber, different construction
but i think the sprinters will be more puncture resistant, though if they do hole i'm not sure you can repair them as easily as veloflex
Every single one failed on me eventually.
The inner tube became porous and started to lose pressure, long before the tyre was worn out.
Not sure why, but I suspect the latex? of the tube had become old and cracked.
A Decathlon, Pitstop type sealant fixed it for a few weeks, then it would start leaking again.
So I'm steering clear of these unless I can be sure they're made less than a year ago.
I have never found however a latex tube becoming cracked. They can loose alot of pressure over night my Vittoria corsa's (new) will be flat in 3-4 days from 100 psi. Oddly vittoria latex tubes for clinchers hold pressure much better showing a smaller pressure loss (20 psi over a couple of day).
I'm not blaming anything on anyone, I'm simply saying that I had a bad batch (3) of Veloflex Carbons.
Probably just unlucky, or maybe the seller got hold of some rejects, I don't know. Otherwise, I love the tyre itself, light, grippy and rolls well.
Yes. I use Vittoria corsas and they will be near enough flat after a week of no use. I do put locking tape on the extender threads (the thin white plumbing seaing tape) to help prevent as much air loss as possible but you will always lose it eventually.
Completely normal as they use latex tubes. All Conti tubs use butyl tubes.
as the others say, this is normal, you'll find need to re-inflate every ride as even overnight they'll lose pressure (around 1 to 1.5 bar)
btw when mine turned up i had a very good look at them, the condition is excellent, imho they've been stored very well, and they are definitely veloflex